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    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
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  <body>
    <!-- 质数减法运算 -->
    <script>
      let fun = num => {
        for (let i = num + 1; ; i++) {
          let flag = true
          if (i < 2) continue
          for (let j = 2; j < i; j++) {
            if (i % j == 0) {
              flag = false
              break
            }
          }
          if (flag) return i
        }
      }
      var primeSubOperation = function (nums) {
        for (let i = nums.length - 2; i >= 0; i--) {
          let num = nums[i] - nums[i + 1]
          if (num < 0) continue
          nums[i] -= fun(num)
          if (nums[i] < 1) return false
        }
        // console.log(nums);
        return true
      }
      console.log(primeSubOperation([4, 9, 6, 10]))
    </script>
  </body>
</html>
